Helsinki

$428+ Cheap flights from Seattle (SEA) to Helsinki (HEL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
nov. 15 — nov. 221
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Helsinki-Vantaa are usually found in January or October, booked 73 days in advance, depart on a Sunday or Monday and return on a Wednesday

Find flight deals from Seattle to Helsinki

Cheapest flights from Seattle to Helsinki
Explore the most affordable flight options available from Seattle to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 16, 2025.

This Expedia deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/117:30 amSEA - HEL
2 stops17h 10mScandinavian Airlines
mar. 11/1811:20 amHEL - SEA
2 stops21h 09mScandinavian Airlines
Deal found 10/13$548
This Scandinavian Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3011:45 amSEA - HEL
2 stops36h 55mScandinavian Airlines
lun. 1/124:05 pmHEL - SEA
2 stops40h 11mScandinavian Airlines
Deal found 10/14$622
This Scandinavian Airlines deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/212:45 pmSEA - HEL
2 stops21h 35mScandinavian Airlines
lun. 12/156:15 amHEL - SEA
2 stops22h 45mScandinavian Airlines
Deal found 10/14$637
This Trip.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/307:50 amSEA - HEL
2 stops17h 50mScandinavian Airlines
mié. 11/126:15 amHEL - SEA
2 stops26h 10mScandinavian Airlines
Deal found 10/15$638
This Booking.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/303:35 pmSEA - HEL
1 stop12h 20mIcelandair
mié. 11/121:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 10/15$650
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/112:35 pmSEA - HEL
1 stop12h 20mIcelandair
mar. 11/181:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 10/13$664
This oojo deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/282:35 pmSEA - HEL
1 stop12h 20mIcelandair
vie. 12/51:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 10/14$665
This Orbitz deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/222:10 pmSEA - HEL
2 stops23h 55mScandinavian Airlines
dom. 11/96:15 amHEL - SEA
2 stops26h 16mScandinavian Airlines
Deal found 10/14$672
This oojo deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/142:35 pmSEA - HEL
1 stop12h 20mIcelandair
vie. 11/211:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 10/15$684
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/282:35 pmSEA - HEL
2 stops19h 45mMultiple Airlines
vie. 12/56:15 amHEL - SEA
2 stops20h 45mMultiple Airlines
Deal found 10/14$690
This oojo deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/282:35 pmSEA - HEL
1 stop12h 20mIcelandair
sáb. 1/101:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 10/15$702

Cheap flight deals from Seattle to Helsinki

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Helsinki (HEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octubre 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$517
(FlightHub)

One-way from

$428
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$571

Good round-trip deal

$499 or less

Good one-way deal

$591 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Helsinki-Vantaa flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Helsinki-Vantaa flights.
From Seattle/Tacoma Intl to Helsinki-Vantaa
One-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa
Highest demand for flights based on searches. 20% potential increase in price ($216 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Average for round-trip flights in October 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Helsinki-Vantaa.
Price to beat on a one-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa.

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Helsinki that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 16, 2025.
Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.

Fly from

Seattle

Fly to

Helsinki

Route

Depart

Return

Price

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

vie. 2/27

2:00 pm-8:20 pm

2 stops20h 20m

Helsinki-Vantaa

mar. 5/12

11:15 am-11:27 pm

2 stops22h 12m

$517

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mar. 2/24

7:20 am-10:40 am

2 stops17h 20m

Helsinki-Vantaa

mar. 3/3

6:15 am-10:25 pm

2 stops26h 10m

$536

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

vie. 2/27

10:55 am-5:55 pm

3 stops21h 00m

Helsinki-Vantaa

mar. 5/19

11:15 am-11:27 pm

2 stops22h 12m

$606

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

vie. 3/13

10:55 am-3:25 pm

2 stops19h 30m

Helsinki-Vantaa

mar. 3/24

7:00 am-10:16 pm

3 stops24h 16m

$613

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mié. 12/31

7:10 am-10:40 am

2 stops41h 30m

Helsinki-Vantaa

lun. 1/12

9:00 pm-10:16 pm

2 stops35h 16m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mar. 12/30

11:45 am-10:40 am

2 stops36h 55m

Helsinki-Vantaa

jue. 1/8

11:20 am-10:22 pm

2 stops21h 02m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mié. 12/31

7:10 am-10:40 am

2 stops41h 30m

Helsinki-Vantaa

jue. 1/8

11:20 am-10:22 pm

2 stops21h 02m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mié. 12/31

7:10 am-3:25 pm

2 stops22h 15m

Helsinki-Vantaa

vie. 1/9

4:05 pm-10:22 pm

2 stops40h 17m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mar. 12/30

11:45 am-3:25 pm

2 stops41h 40m

Helsinki-Vantaa

vie. 1/9

4:05 pm-10:22 pm

2 stops40h 17m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

mié. 12/31

1:45 pm-10:40 am

2 stops34h 55m

Helsinki-Vantaa

mié. 1/7

4:05 pm-10:16 pm

2 stops40h 11m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 14 results
1
2

Compare providers for flights from Seattle to Helsinki

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Helsinki in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Helsinki flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Helsinki flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Helsinki flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Helsinki flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Helsinki

Have a flexible travel schedule? Discover the best time to fly to Helsinki from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Helsinki

How far ahead should I book a flight from Seattle to Helsinki?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Helsinki. Price data was last updated on October 10, 2025.

The best time to book flights from Seattle to Helsinki is 73 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Helsinki?

Currently, January is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $307). Flying from Seattle to Helsinki in June is currently the most expensive (average of $804). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to HEL?

Find hourly flight availability from Seattle to Helsinki. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 16, 2025.

It’s optimal to fly from Seattle to Helsinki in the morning. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from Seattle to Helsinki?

Reviews of airlines servicing Helsinki

Get insights into the airlines that provide service to Helsinki. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helsinki. Reviews last updated octubre 16, 2025.
Get a feel of what it's like to fly with Finnair, Scandinavian Airlines, and American Airlines from Seattle to Helsinki by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Boarding

7.6

Entertainment

6.9

Crew

8.1

Food

6.7

Comfort

7.4

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sep 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Helsinki. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How popular is this Seattle to Helsinki flight route?

  • How long is the flight from Seattle to Helsinki?

    Airlines like Scandinavian Airlines fly from Seattle to Helsinki in about 20h 20m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 4764 mi.

  • What are the cheapest airlines flying from Seattle to Helsinki round-trip?

    Cheapflights users have booked flights from Seattle to Helsinki round-trip from $322. Other airlines that can offer you cheap pricing are Icelandair, from $423, and KLM, from $536. Users have found that Scandinavian Airlines is 60% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Seattle to Helsinki?

    Consider American Airlines (14%), Alaska Airlines (14%) or Finnair (14%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Helsinki.

  • What are the cheapest flights from Seattle to Helsinki?

    The cheapest flight price from Seattle to Helsinki is $491. On average you can expect to pay $746. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $517.

  • Can I find deals for flights from Seattle to Helsinki that include hotel bookings?

    Yes. In addition to deals on Seattle to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Helsinki?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Helsinki.

  • Can I find deals for business class flights from Seattle to Helsinki?

    Yes. Cheapflights offers flight deals from Seattle to Helsinki by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Helsinki?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $307). Flying from Seattle to Helsinki in June is currently the most expensive (average of $804). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Helsinki?

Book flights to Helsinki if you plan to visit one of these locations
Vantaa
Lahti

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Alternative routes for Seattle to Helsinki

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Seattle to Helsinki

Discover the top 7 airlines that operate flights from Seattle to Helsinki. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$322Average$554FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$423Average$777FlexibilityNo cancel feeOn-time76%
KLMCheapest$536Average$910FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$601Average$1,093FlexibilityNo cancel feeOn-time71%
FinnairCheapest$662Average$1,003FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$721Average$880FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$725Average$1,093FlexibilityNo cancel feeOn-time70%

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